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158
core/warning.js
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158
core/warning.js
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/**
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* Visual Blocks Editor
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*
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* Copyright 2012 Google Inc.
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* http://blockly.googlecode.com/
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @fileoverview Object representing a warning.
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* @author fraser@google.com (Neil Fraser)
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*/
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'use strict';
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goog.provide('Blockly.Warning');
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goog.require('Blockly.Bubble');
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goog.require('Blockly.Icon');
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/**
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* Class for a warning.
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* @param {!Blockly.Block} block The block associated with this warning.
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* @extends {Blockly.Icon}
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* @constructor
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*/
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Blockly.Warning = function(block) {
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Blockly.Warning.superClass_.constructor.call(this, block);
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this.createIcon_();
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};
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goog.inherits(Blockly.Warning, Blockly.Icon);
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/**
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* Warning text (if bubble is not visible).
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* @private
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*/
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Blockly.Warning.prototype.text_ = '';
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/**
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* Create the icon on the block.
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* @private
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*/
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Blockly.Warning.prototype.createIcon_ = function() {
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Blockly.Icon.prototype.createIcon_.call(this);
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/* Here's the markup that will be generated:
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<path class="blocklyIconShield" d="..."/>
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<text class="blocklyIconMark" x="8" y="13">!</text>
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*/
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var iconShield = Blockly.createSvgElement('path',
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{'class': 'blocklyIconShield',
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'd': 'M 2,15 Q -1,15 0.5,12 L 6.5,1.7 Q 8,-1 9.5,1.7 L 15.5,12 ' +
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'Q 17,15 14,15 z'},
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this.iconGroup_);
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this.iconMark_ = Blockly.createSvgElement('text',
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{'class': 'blocklyIconMark',
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'x': Blockly.Icon.RADIUS,
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'y': 2 * Blockly.Icon.RADIUS - 3}, this.iconGroup_);
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this.iconMark_.appendChild(document.createTextNode('!'));
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};
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/**
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* Create the text for the warning's bubble.
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* @param {string} text The text to display.
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* @return {!SVGTextElement} The top-level node of the text.
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* @private
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*/
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Blockly.Warning.prototype.textToDom_ = function(text) {
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var paragraph = /** @type {!SVGTextElement} */ (
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Blockly.createSvgElement(
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'text', {'class': 'blocklyText', 'y': Blockly.Bubble.BORDER_WIDTH},
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null));
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var lines = text.split('\n');
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for (var i = 0; i < lines.length; i++) {
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var tspanElement = Blockly.createSvgElement('tspan',
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{'dy': '1em', 'x': Blockly.Bubble.BORDER_WIDTH}, paragraph);
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var textNode = document.createTextNode(lines[i]);
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tspanElement.appendChild(textNode);
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}
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return paragraph;
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};
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/**
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* Show or hide the warning bubble.
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* @param {boolean} visible True if the bubble should be visible.
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*/
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Blockly.Warning.prototype.setVisible = function(visible) {
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if (visible == this.isVisible()) {
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// No change.
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return;
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}
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if (visible) {
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// Create the bubble.
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var paragraph = this.textToDom_(this.text_);
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this.bubble_ = new Blockly.Bubble(
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/** @type {!Blockly.Workspace} */ (this.block_.workspace),
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paragraph, this.block_.svg_.svgGroup_,
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this.iconX_, this.iconY_, null, null);
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if (Blockly.RTL) {
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// Right-align the paragraph.
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// This cannot be done until the bubble is rendered on screen.
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var maxWidth = paragraph.getBBox().width;
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for (var x = 0, textElement; textElement = paragraph.childNodes[x]; x++) {
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textElement.setAttribute('text-anchor', 'end');
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textElement.setAttribute('x', maxWidth + Blockly.Bubble.BORDER_WIDTH);
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}
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}
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this.updateColour();
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// Bump the warning into the right location.
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var size = this.bubble_.getBubbleSize();
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this.bubble_.setBubbleSize(size.width, size.height);
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} else {
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// Dispose of the bubble.
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this.bubble_.dispose();
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this.bubble_ = null;
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this.body_ = null;
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this.foreignObject_ = null;
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}
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};
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/**
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* Bring the warning to the top of the stack when clicked on.
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* @param {!Event} e Mouse up event.
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* @private
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*/
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Blockly.Warning.prototype.bodyFocus_ = function(e) {
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this.bubble_.promote_();
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};
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/**
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* Set this warning's text.
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* @param {string} text Warning text.
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*/
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Blockly.Warning.prototype.setText = function(text) {
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this.text_ = text;
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if (this.isVisible()) {
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this.setVisible(false);
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this.setVisible(true);
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}
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};
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/**
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* Dispose of this warning.
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*/
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Blockly.Warning.prototype.dispose = function() {
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this.block_.warning = null;
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Blockly.Icon.prototype.dispose.call(this);
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};
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